<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<div id="app">
<input type="text" :value = "message" @input="message = $event.target.value">
</div>
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.16/dist/vue.js"></script>
<script>
  const  app  = new Vue({
    el: '#app',
    data:{
      message:'qqqqq'
    }

  })
</script>
</body>
</html>
